Construction of Functionalized 2<i>H</i>-Pyran-2-ones via N-Heterocyclic Carbene-Catalyzed [3 + 3] Annulation of Alkynyl Esters with Enolizable Ketones
作者:Zheng Liang、Jibin Li、Lei Wang、Zexuan Wei、Jiahui Huang、Xinrui Wang、Ding Du
DOI:10.1021/acs.joc.2c02392
日期:2023.2.3
A new synthesis of functionalized 2H-pyran-2-ones has been developed through N-heterocyclic carbene-catalyzed formal [3 + 3] annulation of alkynyl esters with enolizable ketones. The key to the success of this protocol relies on the use of an NHC instead of a tertiaryamine as the catalyst. This protocol also features a broad substrate scope and mildmetal-free conditions, offering simple and rapid